CS 1331 Exam 1 with accurate detailed solutions

CS 1331 Exam 1 with accurate detailed|!! |!! |!! |!! |!! |!! |!!




solutions


Array - correct answer✔✔Linear, homogenous set of data where you can
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access each element by an increasing index starting at 0
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What does it mean when we say an array is "homogenous"? - correct
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answer✔✔The array is of a specific type set upon its declaration, i.e. you |!! |!! |!! |!! |!! |!! |!! |!! |!! |!! |!! |!! |!!




can't put doubles in a String[] array
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How would you declare an array of integers named "a"? (no specified
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length or contents) - correct answer✔✔int[] a;
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How would you declare an array of length 10 with integers inside named
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"a"? - correct answer✔✔int[] a = new int[10]
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What two ways could you declare an array of integers 1-10 increasing by
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1 named "a"? - correct answer✔✔1) int[] a = {1,2,3,4,5,6,7,8,9,10}
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or with a for loop
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If you declare an array as "int[] a;", what do you have to re-do when you
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instantiate it? - correct answer✔✔Restate the type: |!! |!! |!! |!! |!! |!!




"a = new int[] {2,4,6}"
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How would you access the 1st element of array "a"? - correct
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answer✔✔a[0];



How do you access the length of array "a"? - correct answer✔✔a.length
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, Is accessing the length of an array a method? Why or why not? - correct
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answer✔✔No! It's a public int part of the array class, hence NO |!! |!! |!! |!! |!! |!! |!! |!! |!! |!! |!! |!!




parenthesis



What is an array? - correct answer✔✔An object
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For array "a" is a[a.length] a valid way to access an element? - correct
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answer✔✔No! The max index == (a.length - 1) |!! |!! |!! |!! |!! |!! |!!




When you see a problem with an array, what should you use? - correct
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answer✔✔A for loop |!! |!!




What does it mean when we say an array is static? - correct answer✔✔You
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can't resize them! You would have to make a new array of bigger size &
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copy everything. |!!




What is the syntax for a while loop? - correct answer✔✔while
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(someCondition) { |!!




|!! //things that can change someCondition
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}



What is the most common mistake when implementing while loops? -
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correct answer✔✔Creating an infinite loop
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What is the syntax for a do while loop? - correct answer✔✔do {
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} while (someCondition);
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