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PROGRAMMING 11 - 2ND QUARTER > String > Flashcards

String Flashcards

1
Q

It is a sequence of zero or more characters from the Unicode character set.

A

String

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2
Q

It is the sequence consisting of zero characters

A

Null string

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3
Q

What is it called when an object cannot be changed?

A

Immutable

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4
Q

Does a string change once created?

A

NO

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5
Q

If a string does not change once created, what happens instead?

A

Methods produce new strings from old ones

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6
Q

A representation for a string value within the program text

A

String Literal

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7
Q

In Java, it is a sequence of zero or more graphic characters from the Unicode character set or escape sequences, enclosed in double-quotes

A

String Literal

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8
Q

What is the syntax for string declaration?

A

String varname = value;

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9
Q

What does the following String function do?
charAt (int i)

A

Character at position i

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10
Q

What does the following String function do?
compareTo (String t)

A

Compare with t

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11
Q

What does the following String function do?
concat (String t)

A

Concatenation with t

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12
Q

What does the following String function do?
equals (String t)

A

Same characters as t

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13
Q

What does the following String function do?
equalsIgnoreCase

A

Same characters as t (ignoring case differences)

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14
Q

What does the following String function do?
indexOf (char c)

A

Position of the first occurence of c

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15
Q

What does the following String function do?
indexOf (String t)

A

Position of the first occurence of t

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16
Q

What does the following String function do?
length ()

A

Number of characters in String

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17
Q

What does the following String function do?
replace (char c, char d)

A

Replaces c with d

18
Q

What does the following String function do?
substring (int f int t)

A

Substring from position f up to but not including t

19
Q

What does the following String function do?
toLowerCase()

A

Equivalent string in all lowercase

20
Q

What does the following String function do?
toUpperCase()

A

Equivalent string in all uppercase

21
Q

What does the following String function do?
trim ()

A

Equivalent string without leading and trailing white space

22
Q

What would the output be?
String str = “programming”;
char ch = str.charAt(2)
System.out.println(“Character at charAt(2): “ + ch);
ch = str.charAt(5)
System.out.println(“Character at charAt(5): “ + ch);

A

Character at charAt(2): o
Character at charAt(5): a

23
Q

What would the output be?
System.out.println(“Character at charAt(2):” + ch);
String s1 = “Hello”;
String s2 = “Hello;”
String s3 = “HELLO”;
String s4 = “hello”;
System.out.println(“s1.compareTo(s2) “ + s1.compareTo(s2));
System.out.println(“s1.compareTo(s3) “ + s1.compareTo(s3));
System.out.println(“s1.compareTo(s4) “ + s1.compareTo(s4));

A

s1.compareTo(s2) 0
s1.compareTo(s3)
s1.compareTo(s4) -32

24
Q

What value is returned if the content of the strings are the same when using the compareTo function?

A

0

25
Q

What value is returned if the first string comes before the second in alphabetical order when using the compareTo function?

A

A negative value

26
Q

What value is returned if the first string comes after the second in alphabetical order when using the compareTo function?

A

A positive value

27
Q

What would the output be?
String s1 = “Hello”;
String s2 = “Programming”;
String s3 = “Enjoy”;
String s4 = “ s1.concat(s2);
String s5 = “s4.concat(s3);
System.out.println(“s1.concat(s2)» “ + s4);
System.out.println(“s4.concat(s3)» “ + s5);

A

s1.concat(s2)» HelloProgramming
s4.concat(s3)» HelloProgrammingEnjoy

28
Q

What would the output be?
String s1 = “Hello”;
String s2 = “Hello;”
String s3 = “HELLO”;
String s4 = “hello”;
System.out.println(“s1.equals(s2) “ + s1.equals(s2));
System.out.println(“s1.equals(s3) “ + s1.equals(s3));
System.out.println(“s1.equals(s4) “ + s1.equals(s4));

A

s1.equals(s2) true
s1.equals(s3) false
s1.equals(s4) false

29
Q

What would the output be?
String s1 = “Google classroom”;
System.out.println(“s1.indexOf(‘o’) “ + s1.indexOf(‘o’));
System.out.println(“s1.indexOf(‘c’) “ + s1.indexOf(‘c’));
System.out.println(“s1.indexOf(‘s’) “ + s1.indexOf(‘s’));
System.out.println(“s1.indexOf(‘G’) “ + s1.indexOf(‘G’));
System.out.println(“s1.indexOf(‘g’) “ + s1.indexOf(‘g’));
System.out.println(“s1.indexOf(‘x’) “ + s1.indexOf(‘x’));

A

s1.indexOf(‘o’) 1
s1.indexOf(‘c’) 7
s1.indexOf(‘s’) 10
s1.indexOf(‘G’) 0
s1.indexOf(‘g’) 3
s1.indexOf(‘x’) -1

30
Q

What would the output be?
String s1=”The quick brown fox and the dog”
System.out.println(“s1.indexOf(“the”) “+s1.indexOf(“the System.out.println(“s1.indexOf(“Thel”)” + sindexOf(“The System.out.println(“s1.indexOf(“fox")” + s1.indexOf(“fox”));
System.out.println(“s1.indexOf(“Fox") “ + s1.indexOf(“Fox”));
System.out.println(“s1.indexOf("cat”)” + s1.indexOf(“cat”));

A

s1.indexOf(“the”) 24
s1.indexOf(“The”) 0
s1.indexOf(“fox”) 16
s1.indexOf(“Fox”) -1
s1.indexOf(“cat”) -1

31
Q

What would the output be?
String str1=”programming”

System.out.println(“str1.replace(‘m’, ‘g’)»“+str1.replace(‘m’, ‘g System.out.println(“str1.replace("gram", "ham")&raquo_space; “ str1.replace(“gram”, “ham”));

A

str1.replace(‘m’, ‘g’)» progragging str1.replace(“gram”, “ham”)&raquo_space; prohamming

32
Q

What would the output be?
String str1 = “programming”;
System.out.println(“str1.substring(1, 4): “ + str1.substring(1, 4));
System.out.println(“str1.substring(2, 7): “ + str1.substring(2, 7));
System.out.println(“str1.substring(3): “ + str1.substring(3));

A

str1.substring(1, 4): rog
str1.substring(2, 7): ogram
str1.substring(3): gramming

33
Q

It is when a method breaks a given string around matches of the given regular expression

A

Split

34
Q

It returns an array of strings computed by splitting the given string

A

Split

35
Q

Method in String class

A

Split

36
Q

It returns an array of strings after splitting an input String based on the delimiting regular expression

A

String[] split(Spring regex)

37
Q

This limits the number of strings returned after split-up

A

String[] split(String regex, int limit)

38
Q

What would the values of the array elements be?
String name = “Ana, Maria, Carla, Vina, Glen”
String breakName[] = name.split(“ “)

A

breakName[0] = Ana
breakName[1] = Maria
breakName[2] = Carla
breakName [3] = Vina
breakName[4] = Glen

39
Q

Split the following into the month, day, and year.
May 11, 2022

A

date = “May 11, 2002”;
date1 = date.split(“,”);
// date1[0] = May 11,
// date1[1] = 2002
date2 = date1[0].split(“ “);
// date2[0] = May
// date2[1] = 11
// date1[1] = 2002

40
Q

String sentences = “Java Programming is fun and easy”;
String splitSentence[] = sentence.split(“ “);
System.out.println(“Sentence: “ + sentence);
System.out.println(“After Split”);
for (int x = 0; x<splitSentence.length; x++) {
System.out.println(“splitSentence[” + x + “]” + splitSentence[x]);
}

A

splitSentence[0] Java
splitSentence[1] Programming
splitSentence[2] is
splitSentence[3] fun
splitSentence[4] and
splitSentence[5] easy

PROGRAMMING 11 - 2ND QUARTER (4 decks)

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