InstructionsTotal Questions: 40Total Minutes: 40This ExamTray Free Online Test or Quiz or Trivia tests your Programming Skills on Java Arrays and Multidimensional Arrays. This test displays answers after finishing the exam for review. You can easily clear Competitive Exams and Job Interview Questions. Students can learn Java basics. Go through Java Theory Notes on Arrays before attempting this test. All the Best Challenge SCORE0 / 40Take This Exam 1*2*3*4*5*6*7*8*9*10*11*12*13*14*15*16*17*18*19*20*21*22*23*24*25*26*27*28*29*30*31*32*33*34*35*36*37*38*39*40*Q Buttons 1) An Array in Java is a collection of elements of ___ data type. A) Same B) Different C) - D) - 2) The Java Virtual Machine (JVM) implements arrays as ___ type. A) Primitive B) Object C) - D) - 3) Unlike C-Arrays, the Java-Arrays have ___. A) Names B) Values C) Methods and Fields D) None 4) An array declaration in Java without initialization ___ memory. A) Does not allocate B) Allocates memory C) - D) - 5) In Java language, an array index starts with ___. A) -1 B) 0 C) 1 D) Any integer 6) Which are the special symbols used to declare an array in Java? A) Braces { } B) Parentheses () C) Square Brackets [ ] D) Angled Brackets < > 7) Which are the special symbols used to initialize an array at the time of the declaration itself? A) Parentheses ( ) B) Square Brackets [ ] C) Braces { } D) Angled Brackets < > Ad 8) It is possible to skip initializing some elements of the array during Shorthand Initialization. (TRUE / FALSE) A) FALSE B) TRUE C) - D) - 9) In Java, an array can be declared without initialization without mentioning the size. (TRUE / FALSE) A) TRUE B) FALSE C) - D) - 10) What is the output of the below Java code snippet with arrays? static int[] nums; public static void main(String args[]) { System.out.println(nums.length); } A) 0 B) null C) Compiler error D) Runtime Exception - Null Pointer Exception 11) What is the output of the below Java program? int[] marks = {35,65,95}; System.out.print(marks.length + "," + marks[1]); A) 2,65 B) 3,95 C) 3,65 D) Compiler error 12) What is the output of the below Java code snippet? int[] balls = {}; System.out.print(balls.length); A) 0 B) -1 C) 1 D) Compiler error 13) Which is the correct way of knowing Array Size in Java? A) //int[] ary; ary.length() B) //int[] ary; ary.length C) //int[] ary; ary->length() D) //int[] ary; ary->length 14) What is the output of the below Java program with arrays? String[] colors = {"RED";"YELLOW";"WHITE"}; System.out.print(colors[2]); A) RED B) YELLOW C) WHITE D) Compiler error Ad 15) What is the output of the below Java program with arrays? public class Polo { public static void main(String args[]) { String[] computer = {"RAM","HDD","MOUSE"}; String[] parts = {computer[0],computer[2]}; System.out.print(parts[1]); } } A) RAM B) HDD C) MOUSE D) Compiler error 16) What is the output of the below Java program? int ages[3] = {25, 27, 30}; System.out.println(ages[1]); A) 25 B) 27 C) 30 D) Compile error 17) We should not specify the array size if declaration and initialization are done at the same time. (TRUE / FALSE) A) FALSE B) TRUE C) - D) - 18) If an index of an element is N, what is its actual position in the array? A) N-1 B) N C) N+1 D) N+2 19) An array in Java can be declared only of some predefined types. (TRUE/FALSE) A) FALSE B) TRUE C) - D) - 20) The name of an array variable or identifier can start with ___. A) A letter B) Underscore ( _ ) C) Dollar Symbol ($) D) All 21) Shorthand array initialization in Java needs the keyword "new" to allocate memory to the array and elements. State TRUE or FALSE. A) FALSE B) TRUE C) - D) - Ad 22) Lazy initialization of array requires the keyword "new" to allocate memory to the array and its elements. State TRUE or FALSE. A) FALSE B) TRUE C) - D) - 23) What is the default value of an element of Object type array? A) 0 B) null C) -1 D) Garbage value 24) What is the default value of byte, short, int or long data type elements of an array in Java? A) -1 B) 1 C) 0 D) Garbage value 25) What is the default value of float or double data type elements of an array in Java? A) 0 B) 0.0 C) 1 D) 1.0 26) What is the default value of a char data type elements of an array in Java? A) 'A' B) '\0' C) null D) '\0' or null 27) What is the default value of boolean data type elements of an array in Java? A) true B) false C) - D) - 28) Allocating memory with the keyword "new" causes the array elements to carry default values. State TRUE or FALSE. A) FALSE B) TRUE C) - D) - Ad 29) What is the output of the below Java program? int balls[], rounds=3; balls = new int[rounds]; for(int i=0; i<balls.length; i++) balls[i] = (i+1)*2; for(int j=0; j<balls.length; j++) System.out.print(balls[j] + ","); A) 0,2,4, B) 1,2,3, C) 2,4,6, D) Compiler error 30) What is the output of the below Java program with arrays? String[] ary = {"KITE", "AIR"}; String str = "PLANE"; ary[1] = str; str = "FLY"; System.out.println(ary[1]); A) AIR B) PLANE C) FLY D) Compiler error 31) An array of arrays in Java is called ___ array. A) Bidirectional B) Combo C) Multidimensional D) Multi-value 32) A multidimensional array contains elements of the same data-type in all rows and columns. State TRUE or FALSE. A) FALSE B) TRUE C) - D) - 33) An array of dimension N contains __ number of subscripts or brackets? A) N-1 B) N C) N+1 D) 10*N 34) An array with two dimensions is called a two-dimensional array in Java. State TRUE or FALSE. A) TRUE B) FALSE C) - D) - 35) Row number and Column number in a Multidimensional array start with ___. A) -1 B) 0 C) 1 D) 2 Ad 36) A 4-dimensional array is an array of ___ dimensional arrays. A) 4 B) 3 C) 2 D) 1 37) Choose the correct way of initializing a multidimensional array below. A) int[][] code = {{1,2},{3,4,5}}; B) int[2][] code = {{1,2},{3,4,5}}; C) int[][] code={1,2, 3,4,5}; D) All 38) What is the output of the Java program with the multidimensional array? int[][] goats; goats = new int[3][]; goats[0] = {1,2}; System.out.println(goats[0][1]); A) 0 B) 1 C) 2 D) Compiler error 39) State TRUE or FALSE. In a multidimensional array, the number of Columns in each Row can be different. 1 2 3 4 5 6 A) FALSE B) TRUE C) - D) - 40) While mentioning the array size in a multidimensional array using the new keyword, the left-most script is mandatory. State TRUE or FALSE. int ary[][]; ary = new int[5][];//first dimension is compulsory. A) FALSE B) TRUE C) - D) - FINISH EXAM 1*2*3*4*5*6*7*8*9*10*11*12*13*14*15*16*17*18*19*20*21*22*23*24*25*26*27*28*29*30*31*32*33*34*35*36*37*38*39*40*PREV Java loops while for do while Online Test NEXT Java Classes and Objects Online Test 1 Certification Group ID 3845
