Computer Knowledge

Programming Fundamentals

2,611 Questions

Programming fundamentals form the core logic of software development and computer science. This includes variable declarations, pointer assignments, loop iterations, and exception handling. These technical topics are regularly tested in computer knowledge and IT officer competitive examinations.

Variables and arraysPointer assignmentsLoop iterationsException handling blocksCompile time errorsFunction references

Programming Fundamentals Questions

Multiple choice technology testing

The___________ tab enables you to run a line of script to set or modify the current value of a variable or VBScript object in your test or function library

  1. View

  2. Variables

  3. Command

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

The Command tab in QTP/UFT's Debug Viewer is specifically designed to execute VBScript statements during debugging. You can type and run single-line scripts to inspect or modify variable values in real-time.

Multiple choice technology mainframe

Which Statement is used to End the COBOL Program?

  1. End

  2. Stop Run

  3. Stop

  4. End-If
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

STOP RUN is the COBOL statement that terminates program execution. It closes all files and returns control to the operating system. END is used to end procedures (like END-EVALUATE), not programs. STOP alone is incorrect. END-IF terminates an IF statement block, not the program.

Multiple choice technology web technology

A cast between datatypes can give you illegal values where as a Convert will throw error if you try to do illegal operations.

  1. True

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

Casting between datatypes can succeed but produce illegal values (e.g., casting a large double to int silently truncates), while Convert methods throw exceptions for invalid operations (e.g., Convert.ToInt32("abc") throws FormatException). Casting is unchecked; Convert validates the operation.

Multiple choice technology programming languages

Is sizeof a keyword?

  1. True

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

In Java, sizeof is an operator (not available at the language level in Java - it exists in C/C++), but it is NOT a reserved keyword. Java has no sizeof keyword because memory size is platform-independent. Therefore the statement 'Is sizeof a keyword' is False, making the claimed answer correct.

Multiple choice technology programming languages

Differences between Value types and Reference types

  1. Value type variables are stored on stack. Reference type variables are stored on heap.

  2. Value type holds the data directly, Reference type points to the location that holds the data.

  3. Value type cannot contain null value. Reference type can contain null value.

  4. A new type cannot be derived from value type. A new type can be derived from reference type.

  5. All of the above
Reveal answer Fill a bubble to check yourself
E Correct answer
Explanation

Value types and reference types differ in multiple ways: storage location (stack vs heap), data handling (direct vs pointer), nullability (value types cannot be null), and inheritance (value types are sealed). All options A-D are correct differences, making option E the right answer.

Multiple choice technology web technology

Which statement about packages is true?

  1. Packages can be nested.

  2. You can pass parameters to packages.

  3. A package is loaded into memory each time it is invoked.

  4. The contents of packages can be shared by many applications.
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

PL/SQL packages are stored database objects whose specifications and bodies can be shared across multiple applications. Packages cannot be nested, cannot accept parameters directly (though their subprograms can), and are loaded into memory once per session rather than on every invocation.

Multiple choice technology databases

Which substitution variable would you use if you want to reuse the variable value without prompting the user each time?

  1. "&"

  2. ACCEPT

  3. PROMPT

  4. "&&"
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The && (double ampersand) substitution variable retains its value after first use, eliminating repeated prompts. The & variable prompts each time it's referenced. ACCEPT and PROMPT are commands for interactive input, not substitution variables. && is the correct choice for reuse without prompting.

Multiple choice technology programming languages

In regard to CALL, which of the following is NOT a valid statement?

  1. CALL FUNCTION

  2. CALL SCREEN

  3. CALL TRANSACTION

  4. CALL PROGRAM
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

To understand this question, the user needs to know about CALL statements in programming. CALL statements are used to call other programs or functions within a program.

Now, let's go through each option and explain why it is right or wrong:

A. CALL FUNCTION: This is a valid statement in programming. It is used to call a specific function within a program.

B. CALL SCREEN: This is also a valid statement in programming. It is used to call a specific screen within a program.

C. CALL TRANSACTION: This is a valid statement in programming. It is used to call a specific transaction within a program.

D. CALL PROGRAM: This is NOT a valid statement in programming. The correct statement is CALL FUNCTION, which is used to call a specific function within a program.

Therefore, the answer is: D

Multiple choice technology mainframe

When a RETURN clause is used in a subroutine, a value can be passed back to the calling EXEC. Which statements are correct?

  1. This value is stored in the system variable RESULT.

  2. This value is stored in the system variable RC.

  3. This value can be alphanumeric.

  4. This value must be numeric.
Reveal answer Fill a bubble to check yourself
A,C Correct answer
Explanation

In REXX, a subroutine returns a value using the RETURN clause, which is automatically saved in the special variable RESULT. This returned value is a character string and can be alphanumeric.

Multiple choice technology architecture

Consider the following program: void main () { foo (); } void foo () { for ( ; ; ) ; } The code will complete after how many iterations?

  1. 10

  2. 20

  3. Upon integer overflow

  4. Will never complete
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The code for(;;) is an infinite loop in C and C-like languages. The semicolons indicate an empty condition, which evaluates to true, creating a loop that never terminates. The function foo() contains this infinite loop and never returns. Therefore main() never completes after calling foo(). The program will run forever unless externally terminated. Option D is correct - the code will never complete.