Computer Knowledge

Programming Languages and Compilers

2,284 Questions

Programming languages and compilers involve the rules, syntax, and semantics used to write and execute software programs. Key areas include scripting languages, object oriented concepts, and parsing algorithms like top down parsers. Practice these computer science questions to build proficiency for technical and computer knowledge exams.

Object oriented languagesScripting languagesCompilers and parsersProgramming syntax

Programming Languages and Compilers Questions

Multiple choice technology packaged enterprise solutions

PegaRULES Process Commander has an ultimate base class called __________ from which all other classes are derived. This class has properties and activities that are available to all PegaRULES Process Commander applications
  1. "$baseclass"

  2. "@baseclass"

  3. pegabaseclass

  4. pzBaseClass
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

In PegaRULES Process Commander (PRPC), @baseclass is the ultimate base class from which all other classes inherit. It contains standard properties, activities, and rules available to all applications. Other choices like $baseclass or pzBaseClass are syntactically or contextually incorrect.

Multiple choice technology web technology

Microsoft recommends the usage of ASP.NET Mobile Controls for development of web application for mobile devices in ASP.NET 4.0.

  1. True

  2. False
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

ASP.NET Mobile Controls were deprecated by Microsoft and are not recommended for ASP.NET 4.0 mobile web development. Instead, Microsoft recommends using modern approaches like responsive web design, ASP.NET MVC, or CSS media queries to create mobile-friendly applications.

Multiple choice technology programming languages

This is script language and interpreter that is freely available and used primarily on Linux we server as and alternative to Microsoft ASP.

  1. Python

  2. PHP

  3. JavaScript

  4. ActionScript
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

PHP is a server-side scripting language designed for web development, freely available, and commonly used on Linux web servers as an alternative to Microsoft's Active Server Pages (ASP). Python and JavaScript are also scripting languages but are not primarily known as ASP alternatives in the web server context. ActionScript is primarily used for Flash applications, not web servers.

Multiple choice technology programming languages

This is script language and interpreter that is freely available and used primarily on Linux web server as and alternative to Microsoft ASP.

  1. Python

  2. PHP

  3. JavaScript

  4. ActionScript
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

PHP is a server-side scripting language designed for web development, commonly used on Linux web servers as an alternative to Microsoft's ASP (Active Server Pages). It is open-source, freely available, and can be embedded into HTML. Python and JavaScript are general-purpose languages, and ActionScript is for Flash multimedia.

Multiple choice technology testing

What is the keyword that is used to retain the previous values, when we redim a dynamic array to different sizes?

  1. Redim Retain arr(s)

  2. Redim Preserve arr(s)

  3. Redim Persist arr(s)

  4. Redim CarryForward arr(s)
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

In VBScript, when you resize a dynamic array using Redim, the existing values are normally lost. The Preserve keyword retains the existing values when resizing. Redim Retain, Persist, and CarryForward are not valid VBScript keywords for this purpose.

Multiple choice technology testing

Identify the issues in the code below 

Set con = CreateObject("ADODB.Connection") 
con.Open "Provider=Microsoft.ACE.OLEDB.12.0;
Data source=C:\...\Database1.accdb" 
rs = con.Execute("select * from Table1") 
rs.MoveFirst 
Do While rs.EOF     
    Msgbox rs.Fields(0).Name & " : " &rs.Fields(0).Value & " " & rs.Fields(1).Name & " : " &rs.Fields(1).Value & " " & rs.Fields(2).Name & " : " & rs.Fields(2).Value  
Loop 
rs.Close 
con.Close

Issue1) SQL query is issued as an argument to an incorrect method Issue2) Condition with the loop is incorrect Issue3) Code is not designed navigate to the next record in the recordset Issue4) Connection string is incorrectly formed Issue5) Msgbox cannot display data from Database Issue6) Set keyword is missing in a statement

  1. Issue2, Issue3, Issue6

  2. Issue1, Issue2, Issue3

  3. Issue2, Issue4, Issue6

  4. No issues - The code is perfect
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The code has three issues: (1) The loop condition 'While rs.EOF' should be 'While Not rs.EOF' to iterate while there ARE records; (2) Missing 'rs.MoveNext' inside the loop to advance to the next record; (3) Missing 'Set' keyword in 'rs = con.Execute' - should be 'Set rs = con.Execute' for object assignment.

Multiple choice technology testing

What does the ChildElements method of XMLUtil returns?

  1. collection having child nodes/elements

  2. a node/child

  3. true if there are children and false if no children

  4. root node
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

In UFT/QTP XMLUtil, the ChildElements method returns an XMLCollection containing all the child elements/nodes of the specified element. It does not return a single node, boolean status, or the root node.

Multiple choice technology testing

What is the indexed property used to retrieve child nodes from a collection?

  1. collection_obj.element(0)

  2. collection_obj.Item(0)

  3. collection_obj.node(0)

  4. No such property
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

In VBScript with XML DOM, the Item property (not element or node) is the indexed property used to retrieve child nodes from a collection. The syntax collection_obj.Item(0) retrieves the first item from the collection (note that in some contexts this may be 0-indexed or 1-indexed depending on the specific collection type). Options A and C use incorrect property names that are not valid DOM collection methods.

Multiple choice technology mainframe

A cobol Program (Program A) calls Program B. What will happen, If STOP RUN is issued at the end of the Program B?

  1. The control will come back to Program A

  2. The control will not come back to Program A and program B will terminate at the end of the STOP RUN statement

  3. Program B abends Abnormally

  4. Infinite loop
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

In COBOL, the STOP RUN statement terminates the entire run unit, not just the current program. When Program B (called program) executes STOP RUN, it immediately ends program execution and control does NOT return to Program A (the calling program). This is different from GOBACK or EXIT PROGRAM which would return control to the caller.

Multiple choice technology mainframe

Which of the following is not a valid Perform statement?

  1. Perform Para-1

  2. Perform Para-1 Thru Para-2

  3. Perform Section-2 Section

  4. Perform Para-1 20 times
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

In COBOL, you perform paragraphs or sections. 'Perform Section-2 Section' is invalid syntax because appending the word 'Section' after the name in a PERFORM statement is incorrect. The other statements are valid standard COBOL syntax formats.

Multiple choice technology mainframe

Linkage section is present in which division?

  1. Identification

  2. Procedure

  3. Data

  4. Environment
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The Linkage Section is part of the Data Division in COBOL and is used to define data items that are passed between programs or as parameters to a program. It's not part of Identification, Procedure, or Environment divisions.

Multiple choice technology mainframe

Which of the following errors are possible within a COBOL if statement?

  1. Infinite loop

  2. Logical Error

  3. Runtime Error

  4. All the above
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

COBOL IF statements can generate multiple error types: infinite loops from poorly designed conditions, logical errors from incorrect condition logic, and runtime errors from data type mismatches or boundary violations. All three error categories are possible in IF statement implementations.