SS_Java_T1_2021_Choose

The System class is imported by default in any java program because it is in ……… package. java.lang. java.util. java.math. javafx.geometry.

………. is a correct comment form. */…/*. */*…*/*. ///…/. {…}.

An identifier (name) for a variable, method or class must not start with ……….. underscore (_). dollar sign ($). Letter (A…Z, a…z). digit (0…9).

.......... is not a correct variable type. float. short. byte. real.

To declare a named value as constant, you must use the keyword ……… before its name. const. final. static. readonly.

........ is numeric data type of two-bytes width for storing integers. byte. short. int. long.

An integer literal (value) is assumed to be of the ……… type. byte. short. int. long.

A real floating-point literal (value) is assumed to be of the ……… type. float. double. decimal. real.

………. is the escape character used for printing TAB on the console. 't'. 'T'. '\t'. '\T'.

double a = 6.5; System.out.println(a += ++a); prints ……. 13.0. 14.0. 15.0. 16.0.

The value of variable x after executing: int x = 3 * 4 – 2 * ( ( 2 + 10 ) / 2 ) – 2; is ……….. 58. -2. 40. -12.

int x = 2; System.out.println(++x + 13 + x++); prints ……….. 17. 20. 16. 19.

int sum = 0; sum += 4.5; sum += 4.5; System.out.println(sum); prints ……. 9.0. 9. 8.0. 8.

The following expression: a = b += c = d is equivalent to the expression: ………. a = (b += (c = d)). a = ((b += c) = d). ((a = b) += c) = d. (a = b) += (c = d).

The ………. follows the case keyword in the switch statement. ; (semicolon). – (dash). : (colon). , (comma).

The syntax: ………. is required to end each case in the switch statement structure. end;. break;. stop;. return;.

Math.rint(−2.5) returns ……….. -2. -2.0. -3. -3.0.

To get random lowercase letter in the ASCII range 97-122, you must use this expression: ………. (char)(((int)(97 + Math.random())) * 26);. (char)(97 + ((int)(Math.random())) * 26);. (char)(97 + (int)(Math.random() * 26));. (char)(97 + (int)(Math.random() * 25));.

Class ……… is responsible for storing and handling text data. String. Scanner. Math. System.

"abc".compareTo("abg"); returns ……….. 4. -4. 4.0. -4.0.

To extract the substring "to" from String msg = "Welcome to Java"; you must write: ……….. msg.substring(7, 9). msg.substring(7,10). msg.substring(8, 9). msg.substring(8, 10).

"Welcome to Java".indexOf('o',5); returns ……….. 4. 5. 9. 10.

"Welcome to Java".lastIndexOf("Java",5); returns ……….. 11. 12. 0. -1.

int i = 1; while (i < 10); System.out.print(i); prints ………. nothing. 1. 123456789. 10.

int i = 1; do { System.out.print(i); i++; } while(i > 10); prints ………. nothing. 1. 123456789. 10.

The final value of variable x after running: int x; for (x = -5 ; x < 6 ; x += 3) {} is ……….. 7. 6. 5. 4.

The while loop is guaranteed to execute ………. time(s). 0. 1. 2. Infinitely.

int i = 1; while(i < 10) if(i%2 != 0) continue; System.out.print(i); i++; prints ………. 1. 2468. 10. nothing.

String[] strArray = {"hany","ali"}; System.out.print(strArray); prints ………. hany. hanyali. address of the array in the heap stored in reference variable named strArray. will not compile because of syntax error.

char[] city = {'D', 'a', 'l', 'l', 'a', 's'}; System.out.print(city); prints ………. D. Dallas. address of the array in the heap stored in the reference variable named city. will not compile because of syntax error.

int[] list={1,2,3}; for(int i=0; i<=list.length; i++) System.out.print(list[i]+" "); has ……… error. syntax. runtime. logic. no.

int[] list={1,2,3}; for(int i=0; i<list.length(); i++) System.out.print(list[i]+" "); has ……… error. syntax. runtime. logic. no.

int[] list={1,2,3}; for(int i=0; i<list.length-1; i++) System.out.print(list[i]+" "); has ……… error. syntax. runtime. logic. no.

The index number of the last element of an array with 30 elements is ………. system-defined. programmer-defined. 30. 29.

The syntax: ………. correctly declares an array called x. int[] x;. array[] x;. int{} x;. array{} x;.