0

programming languages Online Quiz - 203

Description: programming languages Online Quiz - 203
Number of Questions: 20
Created by:
Tags: programming languages
Attempted 0/20 Correct 0 Score 0

Given: 1. class Ring { 2. final static int x2 = 7; 3. final static Integer x4 = 8; 4. public static void main(String[] args) { 5. Integer x1 = 5; 6. String s = "a"; 7. if(xl < 9) s += "b"; 8. switch(x1) { 9. case 5: s += "c"; 10. case x2: s += "d"; 11. case x4: s += "e"; 12. } 13. System.out.println(s); 14. } 15. } What is the result?

  1. abc

  2. abcde

  3. Compilation fails due only to an error on line 7.

  4. Compilation fails due only to an error on line 8.

  5. Compilation fails due only to an error on line 10.

  6. Compilation fails due only to an error on line 11.


Correct Option: F
  1. Compilation fails

  2. Pi is approximately 3

  3. Pi is approximately 3.141593

  4. An exception is thrown at runtime


Correct Option: D

Which two statements are true about has-a and is-a relationships? (Choose two.)

  1. Inheritance represents an is-a relationship

  2. . Inheritance represents a has-a relationship

  3. Interfaces must be used when creating a has-a relationship

  4. Instance variables can be used when creating a has-a relationship


Correct Option: A,D

public static void test(String str) { if (str == null | str.length() == 0) { System.out.println("String is empty"); } else { System.out.println("String is not empty"); } } And the invocation: test(null); What is the result?

  1. An exception is thrown at runtime.

  2. "String is empty" is printed to output

  3. Compilation fails

  4. "String is not empty" is printed to output.


Correct Option: A

public class TestOne { public static void main (String[] args) throws Exception { Thread.sleep(3000); System.out.println("sleep"); } } What is the result?

  1. Compilation fails.

  2. An exception is thrown at runtime.

  3. The code executes normally and prints "sleep".

  4. The code executes normally, but nothing is print ed.


Correct Option: C

It is recommended to overload run() in your Thread class

  1. True

  2. False


Correct Option: A
  1. . Line 1 will not compile

  2. . Line 2 will not compile

  3. . Line 3 will not compile

  4. . Line 4 will not compile


Correct Option: A,D

The primary key on table EMP is the EMPNO column. Which of the following statements will not use the associated index on EMPNO?

  1. select * from EMP where nvl(EMPNO, '00000') = '59384';

  2. select * from EMP where EMPNO = '59384';

  3. select EMPNO, LASTNAME from EMP where EMPNO = '59384';

  4. select 1 from EMP where EMPNO = '59834';


Correct Option: A

Assuming today is Monday, 10 July 2000, what is returned by this statement: SELECT to_char(NEXT_DAY(sysdate, 'MONDAY'), 'DD-MON-RR') FROM dual;

  1. 03-JUL-00

  2. 10-JUL-00

  3. 11-JUL-00

  4. 17-JUL-00


Correct Option: D

Which character function can be used to return a specified portion of a character string?

  1. INSTR

  2. SUBSTRING

  3. SUBSTR

  4. POS


Correct Option: C

Which character is used to continue a statement in SQL*Plus?

  1. *

  2. /

  3. -

  4. --


Correct Option: C
  1. Assignment Programming Interface

  2. Application Programming Interface

  3. Active Program Interface

  4. None of the above


Correct Option: B

Which API provides classes that are fundamental to the design of the Java programming language?

  1. Java.lang

  2. Java.nio

  3. Java.rmi

  4. Java.basic


Correct Option: A

java.sql API is used for accessing and processing data stored in a data source (usually a relational database) using the Java programming language

  1. True

  2. False


Correct Option: A

Which of the following is not a Java API?

  1. java.nio

  2. java.text

  3. java.xml

  4. java.io


Correct Option: C

Which of the following APIs provides the classes and interfaces for the security framework?

  1. java.io

  2. java.rmi

  3. java.security

  4. None of the above


Correct Option: C
  1. Combined Business-Oriented Language

  2. Combined Business-OnLine Language

  3. Common Business-Oriented Language

  4. Common Business online Language


Correct Option: C
  1. PICTURE clauses

  2. VALUE clauses

  3. 'TO' in the statements

  4. All COBOL verbs


Correct Option: D
- Hide questions