Tag: programming languages

Questions Related to programming languages

If we extends class A in Class B they are sharing which relationship?
technology programming languages

  1. Class A 'is-a' Class B

  2. Class B 'is-a' Class A

  3. Class A 'has-a' Class B

  4. Class B 'has-a' Class A

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Correct Option: B

Match the mobile development platforms with programming languages a. Android i. Java b. Blackberry ii.C c. iPhone iii. Java (RIM APIs) d. BREW iv. Objective C

technology programming languages

  1. a-i,b-iii,c-iv,d-ii

  2. a-ii,b-i,c-iv,d-iii

  3. a-iii,b-i,c-ii,d-iv

  4. a-i,b-iv-c-ii,d-iii

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Correct Option: A

Match the mobile development platforms with programming languages a. Android i. Java b. Blackberry ii.C c. iPhone iii. Java (RIM APIs) d. BREW iv. Objective C
technology programming languages

  1. a-i,b-iii,c-iv,d-ii

  2. a-ii,b-i,c-iv,d-iii

  3. a-iii,b-i,c-ii,d-iv

  4. a-i,b-iv-c-ii,d-iii

Show answer
Correct Option: A

Match the mobile development platforms with programming languages a. Android i. Java b. Blackberry ii.C c. iPhone iii. Java (RIM APIs) d. BREW iv. Objective C
technology programming languages

  1. a-i,b-iii,c-iv,d-ii

  2. a-ii,b-i,c-iv,d-iii

  3. a-iii,b-i,c-ii,d-iv

  4. a-i,b-iv-c-ii,d-iii

Show answer
Correct Option: A

Given the following code: public class Demo { public int method(int x) { int r = 1; r += x; if ((x > 4) && (x < 10)) { r += 2 * x; } else (x <= 4) { r += 3 * x; } else { r += 4 * x; } r += 5 * x; return r; } public static void main(String [] args) { Demo ob = new Demo(); System.out.println("OF(11) is: " + ob.method (11)); } } What is the result?
technology programming languages

  1. OF(11) is: 45

  2. OF(11) is: 56

  3. Compilation fails.

  4. Runtime Exception

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Correct Option: C

import java.io.*; class Master { String doFileWork() throws FileNotFoundException { return "a"; } } class Slave extends Master { public static void main(String[] args) { String s = null; try { s = new Slave().doFileStuff(); } catch ( Exception x) { s = "b"; } System.out.println(s); } //insert a codeline } Choose the correct answers :

technology programming languages

  1. String doFileWork() { return "b"; }

  2. String doFileWork() throws IOException ( return "b"; }

  3. String doFileWork(int x) throws IOException { return "b"; }

  4. String doFileWork() throws FileNotFoundException { return "b"; }

  5. String doFileWork() throws NumberFormatException { return "b"; }

  6. String doFileWork() throws NumberFormatException, FileNotFoundException { return "b"; }

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Correct Option: A,D,E,F

class Demo { public static void main(String[] args) { String s = "- " ; try { doMath(args[0]); s += "t "; // line 6 } finally { System.out.println(s += "f "); } } public static void doMath(String a) { int y = 7 / Integer.parseInt(a); } } At commandline if the input is java Demo What will be output?

technology programming languages

  1. -f and java.ArrayIndexOutOfBoundsException

  2. -f

  3. ArrayIndexOutOfBoundsException

  4. None of these.

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Correct Option: A

class Demo { public static void main(String [] args) { int x = 0; // insert code here do { } while (x++ < y); System.out.println(x); } } Which, inserted at line 4, produces the output 12?

technology programming languages

  1. int y = x;

  2. int y = 10;

  3. int y = 11;

  4. None of the above will allow compilation to succeed.

  5. int y = 12;

  6. int y = 13;

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Correct Option: C

class Demo { static String s = "-"; public static void main(String[] args) { new Demo().method1() ; System.out.println(s); } void method1() { try { method2();} catch (Exception e) { s += "c"; } } void method2() throws Exception { method3(); s += "2"; method3(); s += "2b"; } void method3() throws Exception { throw new Exception(); } } What is the result?
technology programming languages

  1. -

  2. -c

  3. -c2

  4. -2c

  5. -c22b

  6. Compilation fails.

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Correct Option: B

class Ping extends Utils { public static void main(String [] args) { Utils u = new Ping(); System.out.print(u.getInt(args[0])); } int getInt(String arg) { return Integer.parseInt(arg); } } class Utils { int getInt(String x) throws Exception { return 7; } } And the following three possible changes: L1. Declare that main() throws an Exception. L2. Declare that Ping.getInt() throws an Exception. L3. Wrap the invocation of getInt() in a try / catch block. Which change(s) allow the code to compile? (Choose all that apply.)
technology programming languages

  1. Just L1 is sufficient.

  2. Just L2 is sufficient.

  3. Just L3 is sufficient.

  4. Both L1 and L2 are required.

  5. Both L1 and L3 are required.

  6. Both L3 and L2 are required.

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Correct Option: A,C