Which of the following joins compares the tables in the FROM clause and lists only those rows that satisfy the condition in the WHERE clause?
A. inner
B. outer
C. nested
D. product
Answer: A
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. Which of the following statements is false?
a. The following update call receives a dictionary key–value pair to insert or update: country_codes.update({'South Africa': 'za'}) b. Method update can convert keyword arguments into key–value pairs to in-sert—the following call converts the parameter name Australia into the string key 'Australia' and associates the incorrect value 'ar' with that key: country_codes.update(Australia='ar') c. The snippet in Part (b) provided an incorrect country code for Australia. The following code corrects this by using a keyword argument to update the value associated with 'Australia': country_codes.update(Australia='au') d. All of the above statements are true.
All of the following are methods of the ArrayList class except:
a. clear() b. resize() c. contains() d. trimToSize()
Suppose you enter 34.3, the ENTER key, 57.8, the ENTER key, abc, the Enter key. Analyze the following code.
``` 1 Scanner input = new Scanner(System.in); 2 double v1 = input.nextDouble(); 3 double v2 = input.nextDouble(); 4 String line = input.nextLine(); ``` a. After line 2 is executed, v1 is 34.3. b. After line 3 is executed, v2 is 57.8. c. After line 4 is executed, line contains an empty string. d. After line 4 is executed, line is null. e. After line 4 is executed, line contains character "abc".
You would use a ________ symbol to search for unspecified characters
A) wildcard B) generic C) search D) replacement character