Language Fundamentals

Q1:
public interface Foo 
{ 
    int k = 4; /* Line 3 */
}
Which three piece of codes are equivalent to line 3?
  1. final int k = 4;
  2. public int k = 4;
  3. static int k = 4;
  4. abstract int k = 4;
  5. volatile int k = 4;
  6. protected int k = 4;

A 1, 2 and 3

B 2, 3 and 4

C 3, 4 and 5

D 4, 5 and 6

Q2: Which one of the following will declare an array and initialize it with five numbers?

A Array a = new Array(5);

B int [] a = {23,22,21,20,19};

C int a [] = new int[5];

D int [5] array;

Q3: Which one of these lists contains only Java programming language keywords?

A class, if, void, long, Int, continue

B goto, instanceof, native, finally, default, throws

C try, virtual, throw, final, volatile, transient

D strictfp, constant, super, implements, do

E byte, break, assert, switch, include

Q4: Which is the valid declarations within an interface definition?

A public double methoda();

B public final double methoda();

C static void methoda(double d1);

D protected void methoda(double d1);

Q5:
Which four options describe the correct default values for array elements of the types indicated?
  1. int -> 0
  2. String -> "null"
  3. Dog -> null
  4. char -> '\u0000'
  5. float -> 0.0f
  6. boolean -> true

A 1, 2, 3, 4

B 1, 3, 4, 5

C 2, 4, 5, 6

D 3, 4, 5, 6

Q6:
Which three are legal array declarations?
  1. int [] myScores [];
  2. char [] myChars;
  3. int [6] myScores;
  4. Dog myDogs [];
  5. Dog myDogs [7];

A 1, 2, 4

B 2, 4, 5

C 2, 3, 4

D All are correct.

Q7: What is the numerical range of a char?

A -128 to 127

B -(215) to (215) - 1

C 0 to 32767

D 0 to 65535

Q8:
Which three are valid declarations of a float?
  1. float f1 = -343;
  2. float f2 = 3.14;
  3. float f3 = 0x12345;
  4. float f4 = 42e7;
  5. float f5 = 2001.0D;
  6. float f6 = 2.81F;

A 1, 2, 4

B 2, 3, 5

C 1, 3, 6

D 2, 4, 6

Q9: Which one is a valid declaration of a boolean?

A boolean b1 = 0;

B boolean b2 = 'false';

C boolean b3 = false;

D boolean b4 = Boolean.false();

E boolean b5 = no;

Q10: Which is a valid declarations of a String?

A String s1 = null;

B String s2 = 'null';

C String s3 = (String) 'abc';

D String s4 = (String) '\ufeed';

Q11: Which will legally declare, construct, and initialize an array?

A int [] myList = {"1", "2", "3"};

B int [] myList = (5, 8, 2);

C int myList [] [] = {4,9,7,0};

D int myList [] = {4, 3, 7};

Q12: Which is a reserved word in the Java programming language?

A method

B native

C subclasses

D reference

E array

Q13: Which is a valid keyword in java?

A interface

B string

C Float

D unsigned

Q14:
Which three are valid declarations of a char?
  1. char c1 = 064770;
  2. char c2 = 'face';
  3. char c3 = 0xbeef;
  4. char c4 = \u0022;
  5. char c5 = '\iface';
  6. char c6 = '\uface';

A 1, 2, 4

B 1, 3, 6

C 3, 5

D 5 only


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